Telephone.



E. D. LOWRY'.

I TELEPHONE. APPLICATION FILED APR. I6. 1915.

Patented Apr. 11, 1916.

EMILY D. LOWRY, OF PHILADELPHIA, PENNSYLVANIA.

TELEPHONE.

Specification of Letters Patent.

Patented Apr. 11, 1916.

Application filed April 16, 1915. Serial No. 21,671.

are rendered louder, clearer and audible at a distance.

A receiver having my improvements applied thereto can be laid down andthe person receiving the message left at liberty to write or record thecommunication, the usual message being audible in any part of a room ofordinary size containing the-receiver provided with my improvedattachment. This attachment, in the present preferred form, comprises asupplemental diaphragm having means for connecting it to the ear cup ofthe receiver, a pin or strut connecting it with the receiver diaphragm,and a short horn or sound tube through which the vibrations aretransmitted.

The characteristic features of my improvements will more fully appear byreference to the following description and the accompanying drawings inillustration thereof.

In the drawings, Figure l is a part sec: tional side elevation of atelephone receiver having my attachment applied thereto; Fig. 2 is apart sectional side elevation of the attachment; and, Fig. 3 is an endview of the same.

The mechanism shown in the drawing by.

way of illustrating one of the forms of my invention comprises a usualtelephone receiver 1 having the ear cup 2 with the ring 3 thereon andthe diaphragm 4 thereon, in combination with the sound tube 5 having therim 6 which telescopes on the ring 3, the spring clips 7 which engagethe ring to hold the rim in place, the ring 8 which screws into thetube, the auxiliary diaphragm 9 carried by the ring 8, and the pin orstrut 10 fixed to the center of the auxiliary diaphragm.

tro-magnet 4' are communicated to the diaphragm 9 through the pin orstrut 10 and also through the air between the diaphragms, the resultingamplified Vibrations being transmitted through the sound tube 5 by whichthey are further amplified.

The attachment ,can be retained upon the receiver to which it is appliedor temporarily 'connected for special use, as it is adapted to beapplied and detached readily.

The rim or socket 6 and clips 7 can be sprung to effect theiraccommodation to different rings 3 and the ring 8 can be adjusted withinthe tube 5 to provide the proper rela-. tion between the diaphragm 4 andthe strut 10.

The attachment can be carried about and applied at will to any usualreceiver from which amplified sounds are desired.

Having described my invention, I claim:

. 1. The combination with a telephone receiver having a diaphragmsubject to a magnetic field, an auxiliary diaphragm for directlyproducing sound waves, and a strut positivelyconnecting said diaphragms.

2.- The combination with a telephone receiver having a diaphragm subjectto a magnetic field, an auxiliary diaphragm for directly producing soundwaves, means for detachably connecting said auxiliary diaphragm, and astrut for positively connecting said diaphragms.

3. The combination with a telephone receiver having a diaphragm subjectto a mag-' netic field, a device having a diaphragm for directlyproducing sound waves and clips for engaging said receiver, and a strutfor positively connecting said diaphragms.

EMILY D. LOWRY.

Witnesses:

Jos. G. DENNY, Jr., C. N. BUTLER.

